I2C_RS422_RS485_Converter

Feature

• This adapter converts the I2C port of a microcontroller into an RS422/RS485 communication port.
• This adapter allows you to perform half-duplex RS422/RS485 transmission and reception processing from I2C.
• It can be controlled as an I2C device from a microcontroller, and in addition to transmission and reception, you can also set the RS422/RS485 baud rate.
• It is equipped with the I2C/UART protocol bridge SC16IS750 and the RS422/RS485 conversion IC ST3485EIDT.
• The I2C is a Grove compatible connector and supports 3.3V/5V power supplies.
• The RS422/RS485 port is equipped with a 2.54mm pitch screw terminal (VDD, RS422/485+, RS422/485-, GND).
• The I2C/UART protocol bridge SC16IS750 has a built-in 64-byte buffer. Equipped with a 7.3728MHz crystal oscillator, the RS422/RS485 baud rate can be set independently of the microcontroller's main clock.
• The default I2C address is 8bit:0x9A (7bit:0x4D).

Note

• For half-duplex RS422/RS485 communication, set RTS to High when transmitting and set RTS to Low when not transmitting.
• The termination resistor RX2 is not implemented. Connect a termination resistor to RX2 or the terminal block as necessary.
• Board size 33mm x 24mm, fixing hole M3x2 Width 18mm

Details

Sample Code & Details